Mathematics
Kaydawg
2016-09-19 11:37:54
HELP ASAP PLEASE A portion of a circle is removed resulting in figures A and B. The area of figure A equals one third the area of figure B. What is the area of the figure B? Use 3.14 to approximate for π . Enter your answer to the nearest tenth in the box.
ANSWERS
saeedmoradi208
2016-09-19 18:21:20

Solution (1) using angles of sectors: Area of A = pi r^2  x 90/360 = 4.9 Area of B = pi r^2 x 270/360 = 14.2  Check:  Area of A/B = 4.9/14.72 = 1/3 (as given) Solution (2) using given info: Area of B + Area of A = area of circle Area of B + 1/3 Area of B =  3.14 * (2.5)^2 = 19.625 4/3 Area of B = 19.625 Area of B = 3/4 * 19.625 Area of B = 14.72 Area of A = 1/3 * 14.72 = 4.9 There is more solutions to this problem , like polar coordinate integration , and so on. for more just request. 

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